Fairfax County Police said Clayton F. Young, 54, parked his Cadillac Escalade on Fairfax County Parkway near the Pinecrest Road overpass and Fox Mill Road about 6:30 a.m.
The driver of a Freightliner tractor-trailer was driving southbound when the victim stepped in front of the SUV and into the path of the oncoming truck, police said.
The driver of the truck unsuccessfully attempted to avoid the pedestrian. The truck hit the pedestrian and then stopped. The pedestrian hit the roadway and sustained life-threatening injuries, police said.
Young, who lives on Oakton Chase Court , was transported to Reston Hospital Center and was pronounced dead a short time later.
The driver of the tractor-trailer was not injured and neither speed nor alcohol were factors in the crash.